I am 5’5 135 with a B/C chest and I bought a small. It’s not fitted, but not big either- it’s flattering on me and lays very comfortably. For workouts I like short sleeves because i sweat a lot and I absolutely hate slimy pits. It’s risky buying off brand workout gear in my opinion but sometimes it pays off. I ran in this shirt this morning and it was great. Not heavy, felt light and airy and did a great job wicking sweat. It stayed light feeling through the end of the run. Super comfy, just the right amount of flow but fitted enough that it did the job soaking up the underarm sweat. Can’t speak to what the fabric is like in the sun, I was on a treadmill. Obviously, don’t know how it will hold up after washing but for now I’m getting more colors!I love this shirt I have order 5 for work and works everytime. Thank you!I have bought most of the colors now except for the black. Good product, lightweight and so very cool. They wash great and I have had no problems with staining or fading. Thank you for these affordable and pretty shirts. (5 stars from me.)I liked the fit and material.I needed Neon Orange top to match my purple and neon orange tennis shoes and this comfortable shirt was just what I needed.The shirt is fine, but it’s tight. I usually wear an XXL and that’s what I ordered, but it’s too tight. I was trying to find something with a little give. Eh.I work out like I'm trying to join the Olympics. This shirt hides my sweat, and keeps me comfortable. Out of habit, I still fix my shirt to hang straight, but I don't have to with this shirt. I don't have pools of sweat around my neck and under my bra area, like I do with my regular t-shirts. The only little problem I have is that I don't have much extra room with this shirt, and my rolls around my middle do show with this shirt. It's not uncomfortably tight, it does fit. I'll get used to the form fitting and use it to motivate myself to keep working on getting rid of those rolls.I usually don't buy bright colors. I'm a black and white kind of gal mostly. This matched my sneakers and although it is the material for workouts, I will be wearing with a pair of jean shorts or jeans. It is a bit see through but nothing major. I wear black bras with everything.. Safer that way...LOL. Comfy material, very lightweight and color is true to picture.Great Fit Feels Comfortable